US5261807A - Plasticizing assembly for use in an injection molding machine - Google Patents

Plasticizing assembly for use in an injection molding machine Download PDF

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Publication number
US5261807A
US5261807A US07/840,194 US84019492A US5261807A US 5261807 A US5261807 A US 5261807A US 84019492 A US84019492 A US 84019492A US 5261807 A US5261807 A US 5261807A
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Prior art keywords
cylinder
nozzle body
plasticizing
feed screw
plasticizing cylinder
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Expired - Fee Related
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US07/840,194
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English (en)
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Karl Hehl
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Individual
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Individual
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Priority claimed from DE19914105730 external-priority patent/DE4105730C1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/62—Barrels or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B29C45/23—Feed stopping equipment
    • B29C45/231—Needle valve systems therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/60—Screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B29C45/23—Feed stopping equipment
    • B29C2045/235—Feed stopping equipment axially movable inclined or orthogonal valves

Definitions

  • This invention relates to a heatable plasticizing assembly for use in an injection molding machine, which assembly comprises a heatable nozzle body, a rotatable feed screw, and a plasticizing cylinder defining a high-pressure chamber and a cylinder low-pressure chamber, which contains said feed screw, which is provided at its forward end with a back flow valve, wherein the high-pressure chamber comprises a cylindrical portion and is continued in the nozzle body by an axially extending portion tapering from said cylindrical portion to the diameter of the nozzle passage, and said cylinder and nozzle body are connected by a plurality of fixing screws disposed on a circular line.
  • high-pressure chamber describes a chamber which is disposed in front of the back flow valve and during the injection of molten plastic material into the injection mold is hermetically sealed from the low-pressure chamber by said valve.
  • the high-pressure chamber has the largest volume when the feed screw is in its rearmost position. That rearmost position differs from an actual rear position of the feed screw, which actual rear position is determined by the quantity of plastic material required for a given molding to be made.
  • the gap between the nozzle body and the plasticizing cylinder adjoins the high-pressure chamber along the inside peripheral surface of the plasticizing cylinder. That gap is exposed on its inside to the pressure in the high-pressure chamber during the injection of the plastic material and its length is relatively large because it is determined by the inside diameter of the high-pressure chamber. Pressures up to and above 2500 bars may occur in the high-pressure chamber during the injection stroke and will be applied to said gap.
  • the contact pressure between the rear end face of the nozzle body and the forward end face of the plasticizing cylinder must be very high. Under that high contact pressure, the screw threads of the relatively long fixing screws are axially forced strongly against the internal screw threads in the tapped bores of the nozzle body and of the plasticizing cylinder.
  • Prolonged injection molding operations may cause the side faces of the screw threads to stick together owing to the high temperatures to which said screw threads are subjected in the nozzle body and in the plasticizing cylinder.
  • Some of said materials and mixtures tend to release corrosive gases under the extremely high pressure in the high-pressure chamber and said gases enter the gap between the nozzle body and the plasticizing cylinder and reach the screw threads of the fixing screws.
  • U.S. Pat. No. 4,886,439 suggests to connect the nozzle body to the plasticizing cylinder by means of a sleeve, which is adapted to be screw-connected to the plasticizing cylinder and applies an axial pressure to the nozzle body.
  • the nozzle body need not be formed with screw threads, which would give rise to difficulties.
  • the force required to loosen the connecting sleeve is much stronger than the force required to loosen each screw of the plasticizing cylinder described first hereinbefore.
  • a connecting sleeve is secured to the plasticizing cylinder and surrounds the plasticizing cylinder adjacent to the forward portion of the high-pressure chamber and axially overlaps the nozzle body or a forward section of a bipartite plasticizing cylinder in part of its length, and the fixing screws which are axially supported by the screw threads of tapped bores of the connecting sleeve have end faces bearing on abutment faces of the nozzle body or of the forward section.
  • plasticizing assembly the screw threads by which the fixing screws force the nozzle body or the forward cylinder section against the plasticizing cylinder are screwed in the internal screw threads of the tapped bores of the connecting sleeve and are remote from those portions of the nozzle body and the plasticizing cylinder which are heated to critically high temperatures.
  • the screw-threaded joint connecting the connecting sleeve and the plasticizing cylinder is not eliminated for a replacement of the nozzle and constitutes a heat transfer bridge but the temperature adjacent to the fixing screws is far below the temperatures in the nozzle body and the plasticizing cylinder.
  • the screw threads of the fixing screws are stressed in a much smaller length than the screw threads of the fixing screws of the known plasticizing assembly of the kind described first hereinbefore and an ingress of any corrosive gases evolved from the plasticized plastic material as far as to the screw threads of the fixing screws is virtually precluded so that the interengaging screw threads cannot stick together.
  • the nozzle body and the forward cylinder section can be replaced by an exertion of a much smaller physical force and by means of an implement which is light in weight and can easily be handled, particularly because the contact pressure which is required for a tight seal is applied by means of a large number of fixing screws so that the manual force which is exerted on the implement is distributed to a large number of fixing screws and the implement which is required can be carried along by the technician, e.g., in a briefcase or in a small ba.
  • each of the confronting end faces of the nozzle body and of the plasticizing cylinder is finish-machined only in a relatively small annular area, which adjoins the inside peripheral surface of the plasticizing cylinder, respectively.
  • the nozzle body has such a length that the high-pressure chamber is entirely surrounded by the nozzle body regardless of the position of the feed screw and the gap between the end faces on which the nozzle body and the plasticizing cylinder are forced against each other adjoins the low-pressure chamber.
  • the nozzle body is relatively short and the assembly consisting of the nozzle body and the plasticizing cylinder has the same shape as an assembly consisting of a plasticizing cylinder and a relatively long nozzle body, the relatively short nozzle body terminates on the rear of the sealing plane of the back flow valve when the feed screw is in its foremost position, and the relatively long nozzle body terminates behind the sealing plane of the back flow valve when the feed screw is in its rearmost position.
  • the manufacturer of the plasticizing assembly can offer the same in one embodiment comprising a relatively short nozzle body and in another embodiment comprising a relatively long nozzle body.
  • the manufacture of said two embodiments will not involve substantially higher costs because they can be manufactured as modular assemblies comprising only a few required to ensure a tight seal so that the stresses different components so that only a relatively small number of components must be kept in stock and may be provided with the same heating means, nozzle valve means and other control means.
  • the plasticizing cylinder may comprise rear and forward cylinder sections and the forward cylinder section may be connected to the rear cylinder section by means which are similar to those connecting the nozzle body to the forward cylinder section. In that case too the fact that the nozzle body can easily be detached will be an advantage.
  • the plastic material will be plasticized and homogenized to a higher degree because it flows along a longer path so that moldings of higher quality can be made, particularly because the longer plasticizing cylinder permits more kinetic or thermal energy to be supplied to the plastic material.
  • the forward cylinder section of the bipartite plasticizing cylinder is provided at its forward end with means for connecting said forward cylinder section to said nozzle body
  • the rear cylinder section of the bipartite plasticizing cylinder is provided at its forward end with similar means adapted to connect said nozzle body to said rear cylinder section
  • said nozzle body is provided with connecting means for connecting said nozzle body selectively to said connecting means of said forward cylinder section and to said connecting means of said rear cylinder section.
  • the nozzle body can be detached from the forward cylinder section and another nozzle body can e mounted on the forward cylinder section or the forward cylinder section may be omitted and the same nozzle body or a different one may be mounted on the rear cylinder section, which now constitutes the entire plasticizing cylinder.
  • an integral nozzle body may be used, which has a length that is equal to the total length of the nozzle body and the forward cylinder section previously employed.
  • the forward and rear cylinder sections are provided at corresponding positions with bores which open on the outside peripheral surface o the plasticizing cylinder and are adapted to receive means such as temperature sensors and a valve needle.
  • the plasticizing assembly comprises a valve needle for sealing the nozzle passage of the nozzle block and means for actuating said valve needle
  • actuating means comprise a lever, which is pivoted to said rear cylinder section on a pivotal axis, a forward actuating rod, which is pivoted to said lever at a distance from said pivotal axis and is rigidly connected to said valve needle, and a rear actuating rod, which is pivoted to said pivoted lever at a distance from said pivotal axis, and said valve needle extends through a needle-guiding bore in said forward cylinder section, and when said nozzle body is directly mounted on said rear cylinder section said valve needle extends through a needle-guiding bore in said rear cylinder section, said forward actuating rod is shorter than the one used in the plasticizing assembly comprising said forward cylinder section, said lever is shorter than the one used in the plasticizing assembly comprising the forward cylinder section, and said rear actuating rod is pivoted to said lever at the same distance from said first pivot
  • the feed screw contained in the bipartite plasticizing cylinder extends also in the forward cylinder section and the arrangement is such that the contacting end faces of the forward and rear cylinder section adjoin the low-pressure chamber regardless of the position of the feed screw.
  • the feed screw contained in the bipartite plasticizing cylinder is provided with at least one feed screw extension, which is provided on the rear with a stem which is similar to the stem of the back flow valve and extends into a socket of the feed screw or of another feed screw extension and each of said extensions is formed in its forward end face with a socket for receiving the stem of another extension or the stem of the back flow valve.
  • Said extension or one of said extensions may consist of a mixing member, which may comprise mixing disks, which extend at right angles to the axis of the plasticizing cylinder and have approximately the same diameter as the feed screw and are formed in their rims with grooves which are angularly offset in adjacent ones of said disks.
  • the total length of the feed screw assembly may be about 25 times the diameter of the feed screw.
  • the feed screw or feed screw assembly comprising the feed screw extensions may have a length which is about 25 times the diameter of the feed screw.
  • the extensions may consist of screw sections or of mixing members. Regardless of the nature of a given extension, the provision of mating stems and sockets will ensure that the feed screw means can be increased in length in a simple manner in that the components of the feed screw assembly are connected by screw-threaded joints which are similar to the joint by which the back flow valve is connected to the feed screw means.
  • an extension consisting of a mixing member may be mounted directly on the feed screw proper or on a screwlike extension mounted on the feed screw proper.
  • the plastic material can be more thoroughly mixed, e.g., in order to admix coloring materials.
  • the present mixing member comprises mixing disks which occupy almost the entire cross-section of the otherwise free space within the plasticizing cylinder.
  • said mixing disks are formed in their rims with grooves, which are angularly offset on adjacent mixing disks so that said grooves are disposed on helical lines and permit the plastic material to pass through the mixing member in said grooves.
  • the helix angle of the helix defined by said grooves is smaller than the helix angle of the feed screw so that the swirl imparted to the plastic material by the feed screw will inherently be distributed and a more intense mixing will thus be effected.
  • the gap between the forward and rear sections of the plasticizing cylinder is disposed sufficiently to the rear and always adjoins the low-pressure chamber even when the back flow valve has been retracted, usually by three times the diameter of the feed screw, to a rearmost position.
  • FIG. 1 is a side elevation showing partly in vertical section a plasticizing assembly comprising a plasticizing cylinder and a nozzle body.
  • FIG. 2 is an enlarged fragmentary view showing a portion of FIG. 1.
  • FIG. 3 is a perspective view showing the forward end portion of the plasticizing cylinder in vertical section.
  • FIG. 4 is an exploded view showing partly in vertical section the forward end of the plasticizing cylinder, the nozzle body, the screw-threaded connecting sleeve, and the components of the back flow valve.
  • FIG. 5 is a view that is similar to FIG. 2 and shows another embodiment of the plasticizing assembly.
  • FIGS. 6 and 7 are fragmentary side elevations showing partly in vertical section the forward portion of the plasticizing assemblies shown in FIGS. 1 to 4 and in FIG. 5, respectively, but without a nozzle valve and valve-actuating means.
  • FIG. 8 is an end elevation showing the nozzle body, which is provided with a heating cuff, screw-threaded connecting socket and fixing screws.
  • FIG. 9 is a side elevation showing patly in section the plasticizing assembly comprising a bipartite plasticizing cylinder.
  • FIG. 10 is an elevation like FIG. 9 and shows a plasticizing assembly comprising a nozzle valve and valve-actuating means.
  • FIG. 11 is an enlarged view showing the back flow valve.
  • FIGS. 12 and 13 are enlarged views showing different forward sections of a bipartite plasticizing cylinder.
  • FIG. 14 shows a feed screw assembly composed of components shown in FIGS. 11 to 13.
  • a feed screw 12 in the heated plasticizing cylinder 10 feeds the plasticized plastic material into a high-pressure chamber H in front of the feed screw 12 as the latter is yielding back.
  • the feed screw 12 is then axially advanced to inject the plastic material through the nozzle passage 16 into an injection mold.
  • a back flow valve mounted on the feed screw 12 at its forward end is effective to seal the continuously decreasing high-pressure chamber H from the low-pressure chamber N, which contains the feed screw 12.
  • the high-pressure chamber H as a cylindrical rear portion extending in the plasticizing cylinder 10 and a forward portion, which tapers in the rear portion of the nozzle body 11 to the diameter of the nozzle passage 16 and merges into the latter.
  • the nozzle body 11 and the plasticizing cylinder 10 or the forward section 14 of a bipartite plasticizing cylinder 10, 14 have finish-machined confronting end faces 11b and 14b or 10b and adjacent to said end faces the parts 10 and 11 are connected by a large number of angularly spaced apart fixing screws 21 disposed on a circular line.
  • the forward section 14 is connected to the rear section 10 of the bipartite cylinder adjacent to finish-machined end faces by similar fixing screws 121 arranged on a circular line.
  • the plasticizing cylinder 10 or the rear cylinder section 10 Adjacent to the forward portion of the high-pressure chamber H the plasticizing cylinder 10 or the rear cylinder section 10 is surrounded by a connecting sleeve 23 or 123, which surrounds also the nozzle body 11 or the forward cylinder section 14 and is secured to the plasticizing cylinder 10 if it is integral or to the forward section 14 of a bipartite plasticizing cylinder 14, 10.
  • internal screw threads of the connecting sleeve 23 or 123 are screwed onto and axially supported by external screw threads 10a' or 14a' of a flange 10a or 14a of the plasticizing cylinder 10 if it is integral or of the forward section 14 of a bipartite plasticizing cylinder.
  • the fixing screws 21 and 121 extend at an angle of about 45° to the axis z--z of the cylinder and the fixing screws 21 extend through a radial flange 23a of the connecting sleeve 23 and are secured at internal threads 23b or 123b .
  • the free end portions of the fixing screws 21 or 121 extend into recesses 11c or 14c formed in the nozzle body 11 or in the forward section 14 of a bipartite plasticizing cylinder (see FIGS. 6, 7 and 9, 10).
  • the abutment faces 11c' and 14c' are disposed at the bottom of the recesses 11c and 14c.
  • the nozzle body 11 has a rear portion b (FIG. 2), which is larger in diameter than the forwardly adjoining portion and has a forwardly facing annular shoulder, which is in snug contact with an end face 23a' of the flange 23a.
  • the end face 23a' is at right angles to the axis z--z of the cylinder. That portion b of the nozzle body 11 which is relatively large in diameter is surrounded in part of its length by an axial flange 10a of the plasticizing cylinder 10.
  • the back flow valve R comprises an annular seat 13b, which is secured to the forward end face of the feed screw 12 or of the feed screw assembly which will be described hereinafter with reference to FIGS. 13 and 14, a head 13, which is connected by a stem 13c to the feed screw 12 or feed screw assembly and axially spaced from the seat 13b, and a sealing ring 13a, which is axially slidably mounted between the seat 13b and the head 13 and radially protrudes from the seat 13b. o prevent a back flow of the plastic material from the high-pressure chamber H, the sealing ring 13a is in sealing contact with a forward end face of the annular seat 13b, as is shown, e.g., in FIGS. 2 and 6.
  • the length of the nozzle passage 16 is about one-half of the length of the nozzle body 11 so that when the feed screw 12 is in its foremost position the rear end of the nozzle body 11 is disposed adjacent to the forward edge of the sealing ring 13a of the back flow valve R, i.e., in front of the sealing plane s--s (FIG. 6) of the back flow valve.
  • the nozzle body 111 is so long that the high-pressure chamber H is surrounded by the nozzle body 111 throughout its length even when the feed screw 12 is in its rearmost position.
  • a sufficiently long nozzle body 111 can be provided without an increase in weight of the plasticizing assembly in that a cylindrical axial flange 111a, which extends to the rear from the portion b of the nozzle body 111, is an interference fit in a mating annular recess in the wall of the plasticizing cylinder 110. All differences between this embodiment and the one shown in FIGS. 1 to 4 and 6 have now been described. Identical parts of the two embodiments are designated by the same reference characters.
  • the assembly comprising a short nozzle body 11 and a plasticizing cylinder 10 has the same length and shape as the corresponding assembly 111, 110 shown in FIGS. 5 and 7 and comprising a longer nozzle body 111, the rear end of which is disposed behind the sealing plane s'--s' (FIG. 5) of the back flow valve R when the feed screw 12 is in its rearmost position.
  • the length of the plasticizing assembly can be increased in that the plasticizing cylinder is bipartite and consists of a rear section 10 and a forward section 14, which is connected to the rear section by an additional connecting sleeve 123, which is screwed on the external screw threads 10a' of the flange 10a of the rear section 10 and is thus connected to the connecting means provided on the rear section 10. That additional connecting sleeve 123 surrounds the plasticizing rear section 10 adjacent to the low-pressure chamber N so that the gap between the end faces 14b', 10b will not adjoin the high-pressure space H even when the feed screw 12 is in its rearmost position.
  • the rear end portion of the forward section 14 is similar to the rear end portion of the nozzle body 11 in that the contacting end faces 10b and 14b' of the rear and forward sections of the plasticizing cylinder abut in a recess 10c of the forward end face 10b of the rear section 10 so that the cylinder space which accommodates the feed screw 12 is defined by a continuous peripheral surface.
  • the forward section 14 is provided at its forward end with a flange 14a, which has external screw threads 14a' and a forward end face 14b.
  • the external screw threads 14a' are screwed into the internal screw threads of the connecting sleeve 23, which is connected to the nozzle body 11 by the means described hereinbefore.
  • the nozzle body may be integrally formed with the forward section of the bipartite plasticizing cylinder.
  • a nozzle body of the plasticizing assembly is provided with a nozzle valve.
  • the rear section 10 and the forward section 14 of the bipartite plasticizing cylinder are provided each with bores 10d, 10e, 10f and 14d, 14e, 14f, respectively, which are not utilized in the arrangement of FIG. 9 and may be used to accommodate temperature sensors and a valve needle 17.
  • the nozzle passage can be sealed by a valve needle regardless of the use of an integral plasticizing cylinder 10 or a bipartite plasticizing cylinder 10, 14.
  • FIGS. 2 and 10 it is sufficient in the arrangement shown in FIG. 10 to replace the lever 19 shown in FIG.
  • the longer plasticizing cylinder may accommodate either a longer feed screw or a feed screw assembly, which comprises a normal feed screw 12 and at least one feed screw extension 15.
  • the feed screw assembly is longer than the feed screw 12 by five diameters of the feed screw 12 so that the length of the feed screw assembly is 25 times the diameter of the feed screw.
  • the stem 14c of the back flow valve is normally held in the socket 12a in the forward end face of the feed screw 12
  • a similar stem of feed screw extension 15 may be fixed in said socket 12a.
  • Each feed screw extension 15 is formed in its forward end face with a similar socket 15a, which is used to accommodate a stem 15c of a preceding feed screw extension 15 or the stem 13c of the back flow valve.
  • the homogenizing and mixing action can be intensified in that the feed screw assembly comprises a feed screw extension which consists of a mixing member.
  • the mixing member comprises mixing disks 15b, which extend at right angles to the axis z--z of the cylinder and have approximately the same diameter as the feed screw 12.
  • the latter are formed in their rims with grooves 15b' and the grooves 15b' of adjacent disks 15b are angularly offset so that the grooves 15b' are arranged on helices and the plasticized plastic material is forced forwardly from the feed screw 12 through said grooves.
  • the helix angle of the helix on which said grooves are disposed is smaller than the helix angle of the feed screw 12 so that the swirl imparted to the plasticized plastic material by the feed screw 12 is interrupted in the mixing feed screw extension and the mixing action is thus intensified (FIG. 13).
  • the plasticizing cylinder 10 or 110 is surrounded by a protective guard 30.
  • the plasticizing cylinder also could consist of more than only two parts, which may be connected in the same manner as the forward and the rearward parts of the plasticizing cylinder shown in the embodiments.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
US07/840,194 1991-02-23 1992-02-24 Plasticizing assembly for use in an injection molding machine Expired - Fee Related US5261807A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4105730 1991-02-23
DE19914105730 DE4105730C1 (en) 1991-02-23 1991-02-23 Heatable plastifier cylinder for plastic injection moulding machine - has heatable nozzle, high pressure chamber, a reverse flow prohibiting member and a drive
DE4130287A DE4130287A1 (de) 1991-02-23 1991-09-12 Plastifizierzylinder an einer kunststoff-spritzgiessmaschine
DE4130287 1991-09-12

Publications (1)

Publication Number Publication Date
US5261807A true US5261807A (en) 1993-11-16

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US07/840,194 Expired - Fee Related US5261807A (en) 1991-02-23 1992-02-24 Plasticizing assembly for use in an injection molding machine

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US (1) US5261807A (de)
EP (1) EP0501228B1 (de)
JP (1) JP2579861B2 (de)
AT (1) ATE131107T1 (de)
CA (1) CA2060933A1 (de)
DE (2) DE4130287A1 (de)
ES (1) ES2083603T3 (de)

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US6104006A (en) * 1996-07-17 2000-08-15 Kabushiki Kaisha Meiki Seisakusho Method and apparatus for the programmed temperature control of a heating barrel
US20040166191A1 (en) * 2003-02-20 2004-08-26 Graham Packaging Company, L.P. Reservoir reducing screw tip
US20180085984A1 (en) * 2016-09-23 2018-03-29 Engel Austria Gmbh Injection unit for a shaping machine
US20190078467A1 (en) * 2017-09-11 2019-03-14 Ford Global Technologies, Llc Coupling system for turbocharger and emission control device
WO2021154291A1 (en) * 2020-01-31 2021-08-05 Cunningham Charles Stephen Modular injection molding barrel and screw assemblies

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EP0531652A3 (de) * 1991-09-12 1993-05-05 Karl Hehl Plastifizierzylinder an einer Kunststoff-Spritzgiessmaschine
DE19531328C2 (de) * 1995-08-25 1997-12-04 Karl Hehl Spritzgießeinheit für eine Kunststoff-Spritzgießmaschine
EP0846049A2 (de) * 1995-08-25 1998-06-10 Karl Hehl Spritzgiesseinheit für eine kunststoff-spritzgiessmaschine
DE19757449C2 (de) * 1997-12-23 2001-03-01 Karl Hehl Mit einer Verschlußdüse verschließbarer Plastifizierzylinder
CN108748929B (zh) * 2018-07-03 2020-04-24 芜湖博康机电有限公司 一种用于低压注塑成型设备的供胶装置
CN111844603B (zh) * 2020-07-17 2022-01-14 平湖市中美包装科技有限公司 一种工业生产用注塑机

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US6104006A (en) * 1996-07-17 2000-08-15 Kabushiki Kaisha Meiki Seisakusho Method and apparatus for the programmed temperature control of a heating barrel
US20040166191A1 (en) * 2003-02-20 2004-08-26 Graham Packaging Company, L.P. Reservoir reducing screw tip
WO2004074185A2 (en) * 2003-02-20 2004-09-02 Graham Packaging Company L.P. Reservoir reducing screw tip
WO2004074185A3 (en) * 2003-02-20 2004-12-23 Graham Packaging Co Reservoir reducing screw tip
US6957953B2 (en) * 2003-02-20 2005-10-25 Graham Packaging Company, L.P. Reservoir reducing screw tip
US20180085984A1 (en) * 2016-09-23 2018-03-29 Engel Austria Gmbh Injection unit for a shaping machine
US11213985B2 (en) * 2016-09-23 2022-01-04 Engel Austria Gmbh Injection unit for a shaping machine
US20190078467A1 (en) * 2017-09-11 2019-03-14 Ford Global Technologies, Llc Coupling system for turbocharger and emission control device
US10570778B2 (en) * 2017-09-11 2020-02-25 Ford Global Technologies, Llc Coupling system for turbocharger and emission control device
WO2021154291A1 (en) * 2020-01-31 2021-08-05 Cunningham Charles Stephen Modular injection molding barrel and screw assemblies
US11260569B2 (en) * 2020-01-31 2022-03-01 Charles Stephen CUNNINGHAM Modular injection molding barrel and screw assemblies

Also Published As

Publication number Publication date
DE4130287A1 (de) 1993-04-01
JPH0584796A (ja) 1993-04-06
EP0501228B1 (de) 1995-12-06
DE59204529D1 (de) 1996-01-18
DE4130287C2 (de) 1993-07-01
JP2579861B2 (ja) 1997-02-12
ES2083603T3 (es) 1996-04-16
EP0501228A3 (en) 1992-12-02
ATE131107T1 (de) 1995-12-15
CA2060933A1 (en) 1992-08-24
EP0501228A2 (de) 1992-09-02

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